Hi, i've got a 1.6 si which has been running fine starts up first time everytime so far, but its delveloped a missfire when on warm up this only happens if you rev the engine or move the car after starting, but not if you just leave it alone to warm up. and as i just wanna drive it i cba to sit waiting for it to warm up for ten minutes, so have you any ideas how to resolve this problem?

cheers

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